LEI Zhen-yu, LIU Ming. Waterproofness Optimization for Elastic Rubber Gaskets in Shield Tunnels With Random Parameters[J]. Applied Mathematics and Mechanics, 2017, 38(8): 899-910. doi: 10.21656/1000-0887.370289
Citation: LEI Zhen-yu, LIU Ming. Waterproofness Optimization for Elastic Rubber Gaskets in Shield Tunnels With Random Parameters[J]. Applied Mathematics and Mechanics, 2017, 38(8): 899-910. doi: 10.21656/1000-0887.370289

Waterproofness Optimization for Elastic Rubber Gaskets in Shield Tunnels With Random Parameters

doi: 10.21656/1000-0887.370289
  • Received Date: 2016-09-23
  • Rev Recd Date: 2017-06-08
  • Publish Date: 2017-08-15
  • Geometric parameters of elastic rubber gaskets in shield tunnels often present stochasticity influenced by the manufacturing process. Accordingly, the waterproof performance of elastic rubber gaskets will be affected. The coordinates of the hole center, the hole diameter, the section width and height were selected as the input random variables, and the sensitivity values with respect to these random parameters of the gasket’s waterproof performance were obtained by means of the ANSYS PDS module. The results show that the hole diameter has larger effect on the closure pressure and the contact stress than other geometric parameters. At the same time, the vertical position of the hole has greater influence than the horizontal one. On this basis, the closure pressure and the contact stress on the lower surface were selected as state variables, and the maximum contact stress was deemed as the objective function with the closure pressure not higher than a set value. The ANSYS design optimization module was used to conduct the parameter optimization for rubber gaskets, and give a new optimal gasket section geometry for one shield tunnel. The full-size test results verify the reliability of the optimal analysis.
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